fa_classes

Imported from ksfraser/fa_classes (AGENTS.md). Install upstream with npx skills add ksfraser/fa_classes. Copyright stays with the author.

AGENTS.md — KSF FrontAccounting Architecture Notes

Operational memory for the KSF FA infrastructure codebase.

Files live under `/home/kevin/Documents/.

Git repositories (dev trees) live under /home/kevin/Documents/.

Files deployed for Integration Testing live under ksf_Infrastructure/fa_modules/`. This doc captures cross-module architecture decisions and findings. Read this before designing or refactoring anything that spans modules.

Companion doc: AGENTS_ARCH.md (co-located, hardlinked into each repo) holds the shared module conventions and cross-repo engineering standards (module layout, coding/testing standards, dev/deploy workflow, inter-module hook protocols, security-area registry, FA DB gotchas). This file holds only decisions.

ksf_payment_destinations — development tree status

~/Documents/FA_PaymentDestinations/ is an ABORTED branch. Do not develop there. That directory is a bind mount (via ~/Documents/ksf_Infrastructure/) that was used for documentation only — it has no src/, no Tests/, no PSR-4 refactoring, and no @BABOK traceability annotations. All development happened in ~/Documents/ksf_payment_destinations/ which is the primary working dev tree.

If you find yourself editing files in FA_PaymentDestinations/ — STOP and switch to ksf_payment_destinations/ immediately.

Cross-module facts (at a glance)

• PHP 7.3 is the cross-module compatibility floor (current prod runs 7.3 on Fedora 30 until a web container is stood up; the FA container runtime is 7.4). See AGENTS_ARCH.md §1.
• ksf_FA_Common is now a pure Composer/Packagist package (v1.0.9), not an FA module. It was gutted to a no-op module shell. Owning modules (RBAC, CRM, Calendar, HRM, Assets) register/unregister their ksf_contact_types on activate/deactivate via embedded sql/retag_contact_types.sql.
• Square: composer.json config.platform.php = 7.4.33 pinned (commit b0ef4da) for the PHP 7.4 container; lock regeneration is blocked locally on the private ksfraser/import-staging package.
• FA_ProductAttributes issue #52 (child not detected as read-only) root cause found: two parallel, un-unified parent-relationship mechanisms. Full write-up is in that repo's AGENTS.local.md (migrated out of this file).

The "generic data-dictionary + query-builder" direction (active design)

The user wants a generic, transport-agnostic data-dictionary + SQL query builder package (suggested name ksf_common_db), NOT another DB class, and NOT in ksf_FA_Common (whose naming is FA-module-specific). Core requirement:

An interface defines the SQL query commands. A translation layer maps them to MySQL commands when outside FA, and to FA's procedural db_* functions when inside FA, so the correct implementation can be DI'd.

Requirements/goals captured from discussion:

• Want the data dictionary + query builder capabilities (from the legacy ksf_modules_common MODEL/fa_MODEL framework).
• No third parallel DB-class abstraction on top of what exists.
• Lifecycle (pre/post CRUD) hooks should be able to tie into this system.
• Package should be usable standalone (tests, CLI, other frameworks), not just inside FA.

The pattern ALREADY exists / is partially realized (critical to not rebuild)

1. RBAC's DbAdapterInterface + FaDbAdapter (now generalized) — the exact two-part interface→FA-translation pattern the user described: fetchAssoc, fetchAll, executeUpdate, lastInsertId. FaDbAdapter substitutes ? placeholders via mysqli_real_escape_string (FA has NO prepared statements) and regex table prefixing. This served as the proof of concept and has been genericized into the ksfraser/ksf-common-db package (ksfraser\CommonDb\Contract\DbConnectionInterface / ksfraser\CommonDb\Adapter\FaDbAdapter); the RBAC-local copies were deleted. See that package's APPENDIX.md for the migration.
2. Legacy ksf_modules_common (procedural, older) — the actual data-dictionary + query-builder the user remembers:
   • class.MODEL.php — fields_array + table_details['tablename']/['primarykey'] dictionary; clause builders buildSelect/From/Where/Join/GroupBy/Having/OrderBy/Limit assembled by buildSelectQuery(); CRUD select_row, select_table, insert_table, update_table, delete_table, ReplaceQuery, create_table, alter_table; define_table() derives tablename from class name + company prefix.
   • class.fa_MODEL.php — FA subclass; sets company_prefix = TB_PREF.
   • class.eventloop.php — Observer pattern event dispatcher: ObserverRegister, ObserverNotify (with '**' wildcard = all), subscribers implement notified().
   • CAVEAT: the eventloop Observer hooks are wired only for NOTIFY_INIT_TABLES → create_table and logging. They are NOT wired into insert_table/update_table/ delete_table as pre/post CRUD points. The tell_eventloop(..., "NOTIFY_LOG_*", ...) calls are largely logging noise.
3. Modern ksf_FA_Common traits (OOP, current recommendation for hooks)
   • src/Traits/WorkflowHooksTrait.php — SuiteCRM-style lifecycle hooks. Register a record type → hook prefix via registerWorkflowType($recordType, $hookPrefix). fireWorkflowHook() builds {prefix}_{hookKey} and calls hook_invoke_all(...). Hook keys: before_save, after_save, before_delete, after_delete, new, edited, linked, unlinked. Convenience dispatchers + fireWorkflowHooks() runs the full ordered sequence.
   • src/Traits/CrudOperationsTrait.php — createRecord() / deleteRecord() wrappers that fire pre-save → create → new/edited → post-save (and pre-delete → delete → post-delete), delegating the actual DB work to overridable *Internal() methods.
   • Both live in ksfraser\FrontAccounting\Common\Traits\ (namespace is FA-flavored).
   • Adoption is currently minimal: ksf_FA_Common's own unit tests + ksf_FA_HRM/hooks.php. Not yet rolled out module-wide.

Naming observation

The registerWorkflowType($recordType, $hookPrefix) + {prefix}_{operation} scheme already achieves what the user proposed as "DB class reads $table_name to build pre/post hook name." $table_name should map to a hook prefix, not be the literal hook name. Per-table hooks use hook_invoke_all (module-oriented dispatcher from includes/hooks.inc) — consistent with FA, zero new infra. If literal table-derived names are wanted, add a small table→prefix mapper, don't build a new dispatcher.

PDO question (decided: YES, PDO is the standalone impl; FA uses its own adapter)

FA's DB layer is mysqli-based, NOT PDO (includes/db/connect_db_mysqli.inc uses mysqli_connect/query/insert_id/errno/fetch_row; procedural db_query/db_escape/ db_fetch_assoc/db_insert_id wrappers; FA has NO prepared statements).

Design: make PDO the consumer contract of the interface, not the transport. Two implementations of one DbConnectionInterface (PDO-style ops: query, executeWithParams, fetchAll, fetchAssoc, insertId, quote, beginTransaction/commit/rollBack):

• PdoDbAdapter (standalone: tests/CLI/other frameworks) — nearly a 1:1 PDO wrapper, real prepared statements, multi-driver.
• FaDbAdapter (inside FA) — maps each method to FA db_*/mysqli calls, resolves ?/:name placeholders to escaped literals (FA has no prepared statements), exactly like the FA adapter in ksf-common-db (mysqli_real_escape_string binding + regex prefixing).

HARD RULE (user directive): FA modules MUST use native db_* calls at runtime. PDO is ONLY for the standalone/portable side (tests, CLI, non-FA embedding). The FA adapter is the single, mandatory implementation inside FA and must delegate every operation to FA's procedural db_query/db_escape/db_fetch_assoc/db_insert_id/ db_num_rows/db_error etc. — never a PDO handle, never raw mysqli. PDO is the portable contract shape, not a runtime transport for FA. (Note: PDO is an optional for the FA side: the only reason to depend on it at all is standalone usage; the FA adapter itself needs no PDO.)

PDO and FA never meet; they are alternative DI implementations of a shared contract. This satisfies the user's requirement: "interface that translates SQL to MySQL outside FA but db_* inside FA so the right classes can be DI'd." This is realized by the ksf-common-db package's DbConnectionInterface + FaDbAdapter/PdoDbAdapter.

ksf_common_db package — implemented

The ksfraser/ksf-common-db package (namespace ksfraser\CommonDb) exists at ~/Documents/ksf_common_db, is published on Packagist (v1.0.0), and RBAC has been migrated onto it. Repo-specific implementation/packaging/migration/gotcha notes live in that repo's APPENDIX.md — see there for structure, consumers' dependency convention, the RBAC migration, and the implementation gotchas. This section only records the shared design decisions.

Structure (high level):

• src/Contract/DbConnectionInterface.php — PDO-shaped contract: fetchAssoc, fetchAll, fetchScalar, executeUpdate, lastInsertId, quote, beginTransaction, commit, rollBack. Accepts ? (positional) or :name (named) placeholders.
• src/Adapter/FaDbAdapter.php — FA runtime adapter; native db_* only.
• src/Adapter/PdoDbAdapter.php — native PDO + prepared statements (NOT for FA runtime).
• src/Dictionary/TableDefinition.php — data dictionary + CREATE/INSERT/UPDATE/DELETE SQL.
• src/Query/QueryBuilder.php — fluent parameterized SELECT builder.

NEXT STEPS (cross-module): port other modules' DAOs onto DbConnectionInterface + TableDefinition/QueryBuilder, then wire the pre/post workflow hooks (WorkflowHooksTrait/CrudOperationsTrait from ksf_FA_Common) onto the DAO layer.

FA core hook system (reference)

includes/hooks.inc:

• hook_invoke($ext, $method, &$data, $opts) / hook_invoke_all($method, &$data, $opts) / hook_invoke_first / hook_invoke_last — dispatch to $Hooks extension objects.
• Transaction-level DB hooks exist: hook_db_prewrite, hook_db_postwrite, hook_db_prevoid → hook_invoke_all('db_prewrite'|'db_postwrite'|'db_prevoid', $cart, $type). These are CART/transaction scoped (sales orders, invoices, etc.), NOT per-row CRUD. Per-row CRUD hooks are not provided by core; they come from the traits/adapters above.

FA_ProductAttributes — module/tree-specific findings moved to its own repo

Anything FA_ProductAttributes-specific that used to live here (issue #52 root cause, Generate Combinations semantics, the ksf-fa blank-page/bootstrap logs for that module) has been migrated OUT of this shared file into the repo's AGENTS.local.md (~/Documents/FA_ProductAttributes/AGENTS.local.md). Working on that module? Read that file. This shared doc keeps only cross-module decisions and mechanics.

FA extension install & activation mechanics (verified 2026-09, cross-module)

How FA 2.4.x actually installs/activates third-party extensions — applies to every ksf_* module, and is why "clicks on the Extensions page" silently do nothing on a fresh mount. Verified against fa/2.4.3 source + live UAT box.

Registries — two PHP files of $installed_extensions arrays:

• GLOBAL: company/installed_extensions.php (what "Local" and the repo-index install write to).
• PER-COMPANY: company/<id>/installed_extensions.php — this is what activation (Refresh/Update) actually reads and rewrites. Both must be writable by the container's PHP/MySQL UID (see the per-instance bind fix in the repo-local notes).

Registering a local module: the Local<pkg> button (local_extension() in admin/inst_module.php) hardcodes 'version' => '-', 'available' => '' and copies nothing from the module's _init/config. It includes the module's hooks.php and calls install_extension(false).

Activivating (the "Activated for ''" view, extset=<id>):

• Checkboxes are named Active<i> where $i is the index in the MERGED + natural-sorted GLOBAL registry list, NOT the company registry. Map each row's checkbox to its package name from the page HTML before POSTing.
• POST extset=<id>&Refresh=Update&Active<i>=1 (needs the current _token).
• Gate: check_src_ext_version() in includes/packages.inc rejects any version with a leading component below the app's (2.4.3). A version of '-' ALWAYS fails → "incompatible with current application version and cannot be activated". Private/local modules therefore MUST carry a numeric version in the registries (manually set what _init/config declares, e.g. '2.4.4'), the same value the repo index would have supplied.
• activate_hooks($pkg, $comp, true) then calls the module's hooks_<pkg>::activate_extension($comp, false).

SQL prefix convention in module sql/ files: the install engine db_import() (admin/db/maintenance_db.inc) replaces ONLY the literal 0_ → TB_PREF. It does NOT touch {TB_PREF} or @TB_PREF@ (those only work in ksf_FA_Common's own hand-rolled install_schema() helper). All extension sql/*.sql for the FA install path must use literal 0_ table names — {TB_PREF} yields "Table 'ksf_fa.{TB_PREF}x' doesn't exist". (FA_ProductAttributes had 4 files with {TB_PREF}; fixed to 0_ in commit b9f484e.)

Login gotcha (includes/session.inc:545): without company_login_name in the POST, login always fails with 401 "Incorrect Password" even when the user/password is right. Send company_login_name=<id> (+ _token from the login page).

Cross-module activation hazard — duplicate ksf-fa-common class load: ksf_FA_Common ships src/autoload.php as the canonical loader for the ksfraser\FrontAccounting\Common\* namespaces and explicitly must NOT have a PSR-4 pointing at a vendored copy. If another module's Composer autoloader (vendored ksfraser/ksf-fa-common, e.g. FA_ProductAttributes') loads those classes FIRST, then activating ksf_FA_Common (constructor require_once src/autoload.php) redeclares the already-loaded classes → fatal that kills the extension page mid-render (page shows footer only, no message, no registry write). Symptom: activation "does nothing". On the UAT box the workaround was manual activation (schema via raw SQL, active => true set directly in both registries). Proper fix is order-independent guarded loading in src/autoload.php.